S92.335P Nondisplaced fracture of third metatarsal bone, left foot, subsequent encounter for fracture with malunion

Name of the Condition

• Nondisplaced fracture of third metatarsal bone, left foot, subsequent encounter for fracture with malunion.

Summary

A nondisplaced fracture of the third metatarsal bone in the left foot is a break in the long bone connecting the ankle to the toes, where the bone fragments remain in their normal alignment. This code represents a subsequent encounter for a fracture that has healed with malunion, meaning the bone has healed in a misaligned position. Malunion may result from incomplete reduction, poor immobilization, or inadequate healing. Treatment focuses on managing symptoms and addressing functional limitations caused by the misalignment.

Causes

Direct trauma to the left foot, such as a fall, sports injury, or crush injury, is a common cause of the initial fracture. Malunion occurs during the healing process when the bone fragments do not align properly, often due to inadequate immobilization, poor blood supply, or premature weight-bearing. Repetitive stress or insufficient follow-up care can also contribute to malunion.

Risk Factors

• Participation in high-impact sports or activities with foot trauma risk
• Wearing improper or non-supportive footwear
• Conditions that weaken bones, such as osteoporosis or diabetes
• Advanced age, which may reduce bone density and healing capacity
• Previous foot injuries or surgeries affecting alignment
• Inadequate immobilization or non-compliance with treatment plans

Symptoms

• Persistent pain or discomfort in the midfoot area of the left foot
• Swelling or tenderness around the healed fracture site
• Difficulty bearing weight or walking on the left foot
• Altered gait or foot mechanics due to misalignment
• Possible visible or palpable deformity at the fracture site

Diagnosis

A healthcare provider will perform a physical examination to assess pain, swelling, and range of motion. Imaging tests, such as X-rays or CT scans, are used to confirm malunion by evaluating bone alignment and healing. Functional assessments may be conducted to determine the impact on mobility and daily activities.

Treatment Options

Treatment depends on the severity of malunion and functional impairment. Conservative options include pain management, physical therapy to improve strength and mobility, and orthotic devices or footwear modifications. Surgical intervention, such as osteotomy (bone realignment) or joint fusion, may be considered for significant deformity or persistent symptoms.

Prognosis and Follow-Up

Prognosis varies based on the degree of malunion and treatment response. Most patients experience improved function with conservative or surgical management, though some may have residual limitations. Regular follow-up appointments are necessary to monitor healing, assess functional outcomes, and adjust treatment plans as needed.

Complications

• Chronic pain or discomfort
• Altered gait or increased risk of falls
• Development of arthritis in adjacent joints
• Reduced mobility or activity limitations
• Need for additional interventions if symptoms persist

Lifestyle & Prevention

• Wear supportive, properly fitting footwear to reduce stress on the foot.
• Avoid high-impact activities that strain the foot until cleared by a provider.
• Maintain bone health through a balanced diet and regular exercise.
• Follow post-injury care instructions to promote proper healing and alignment.
• Use protective gear during activities with foot trauma risk.

When to Seek Professional Help

Seek medical attention if you experience worsening pain, swelling, or difficulty walking, or if you notice a visible deformity. Prompt evaluation is important if symptoms interfere with daily activities or if you suspect the fracture has not healed correctly.

Tips for Medical Coders

This code is used for a subsequent encounter for a nondisplaced fracture of the third metatarsal bone in the left foot with malunion. Documentation should specify the malunion and confirm it is a subsequent encounter (not initial or acute). Ensure the left foot and third metatarsal bone are clearly identified, and note any contributing factors like trauma or healing complications.